1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bdedaae58ed063bed6ae6e1c2c11c1f7f3747470b025384b305d64157e94ee. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93f09697-9016-4be2-9539-61498b08ce64.json and https://artists.proofprofile.net/proofs/artist/93f09697-9016-4be2-9539-61498b08ce64.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa8e60d30e2afaf846029f0f4b1f4f647543141d5b3e444cd0df81d60d05dc5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1400174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8606f625a84700140d5c3e2f8b20ded1cc746bf19966a87c1b74636271c449bc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d60fd4400183815444db5b4ca2b6b21c658121b27912fb2a74c1cd1a4f0fbec. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1400175.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565daac7e36f38197bf5694ffe01099069a1abefd6184b96ce930d3e18d3d035. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bfe554f9ea5783e4144f89993eb846b27b2d18ff92ed33135940c57b645951. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7600fa21ee1424e6f0151edce29d1f40b6d8e13157a5e1ed99724e465a494f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1400182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a9ac351f8904dda59a21a6fe0330da721a26950fc85e00c66b2689a450e3ee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9100601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bb1a5dfb1e67407f59999068400e2e3a40bb044ebf5ec8cdf6ab4a34a7fac9. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T16:24:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9100604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a02fe1cec189055266f409115394535c70a3557d3ea19fe803d31bd422d05e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56b582827fd80db48c5cd002820355736c3112445a74a8b718927f3daa1b89e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9100607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a681867df27f6f660e052b14222ab36152dc8d2ef8770e012cc679eed6b0ca9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9100609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cdd4c659957683a72194ac74d94b981336a99e62e7cd1a7fd87dc6dd33c9a7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9100612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ece299c819c63bb0cbabc362e0309fe5e9772a54c831c101a5167f58cff9fa2. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9100602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d746d748c41511a7b902ac4b1eac5f96807f9f72fee422218a6a57d9ebd160. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9100603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcf90a3d8bd1ceac3349061cdf66b5a46efb83b4a349a31829bc68f098eec53. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9100606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0ffd88da37549d976ea2efb919126f2657b9f39827bcb2a0a32732aa48b7ee. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9100610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cd4c8776ef2a8c76f592a743f1ae2b19d0f3e8d0ec111e52353d064dc1e011. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9100613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83434ab251cb233f1df35210b4e1eaf0e9c36efa02c4552edc3dcb0df95a66c8. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9100616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3a3743c2d63068313c923c3ee3df05849323fcd7b3c946159825c12b956269. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9803905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c8df447c2acedf272ff19681e98fe3c9eb3898bf1a56915b1ade55d3e24165. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9803907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5656bf29c99b1a866006679fa66fc108d221854a314f0111afe3def5c91c65. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9803909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d10962142d04bbcb3f7264361363ff608af78f22ff1d9345892deff7e346057. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9803901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8ee4822db2d94456cbad299678eb0deb85de2bf9fbf1ac2986ea686499c623. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9803908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0a8a5e3d14e8058b6e08718e93aab5409d255af8c47b43f2f6ee10d3987724. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9802502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87ae2fec29ee46e9b665126492e4d7c6bc8ffb4339dfcaf90d99529d818f391. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9802503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab1628194c5e78150623106dac6f80511b2be6317da17befc6ad3002f64af2b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9802505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb930281432e3c49fa3d419535bcd280cfa7bf54fdb22d9040d7736e152151b76. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9802501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668b44723312b08c365cb2c19d55cb67679327f1ab16dfce45f7fe42ae3b470c. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9802504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72828b81d6bb6d87e362449584b6588c5063c4d5903380209e35f660e2de88b. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG9802508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd260b1205789e35581e14bcf2d367a7cf5587bc73a108f7b5a7ae90c82cfe7b1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6861de8f89a8db2198280c08e4f8869d13a37a650ce30189a6e6f6374de2bfda. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1400192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9aa7b333e894218a499aa9ddf700fa0e907529cffc92faf74f3c32ceac4269. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1400197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd334d3f0d1d7fab5a12f1ab8f57749998a3db6e52825fe62100ff6938ded300. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1400198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc771357b1aa22d44276e0eb446d907bc63201360ad64c80af3c74aef0a73557a. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc709c608618319331f21e53a70aaaf8702f668b14595620efd7f716821cf82b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1400191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6b6be33b3bf4a6a1058d9e77431d1c4710174ec005ce8e630740173cf7bf3e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1400193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754e9821c2c309c5abbb28a5c2305008703626422de32346b0205c5f602ad038. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1400194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff2b82edd47a417c9e023bd3f0e3278da46aad31b9e7814a3db1b34ca855056. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1400195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2748d407c43947f256103a517417596aac05cbba0cbee0ef418e3768e15b13d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKADG1400200.